Final answer:
To meet the requirements in the Small Vessel Regulations, a lifebuoy must be easily accessible, made of buoyant material, have a minimum diameter of 610 millimeters, and be marked with the vessel's name.
Step-by-step explanation:
The Small Vessel Regulations define the requirements for safety equipment on small vessels. According to these regulations, a lifebuoy must meet certain criteria to be compliant. It should be easily accessible, made of buoyant material, and have a minimum diameter of 610 millimeters. The lifebuoy must also be marked with the name of the vessel in block letters. These requirements ensure the safety of the crew and passengers on board.